Dynamic Tests on Full-Scale Structures of Glue-Laminated Timber: Theoretical and Experimental Studies

The article contains the comparative results of the experimental and calculated research of the strength of a pipeline with such defects as “metal loss” and “dent with groove”. Two coils with diameter of 820 mm and the thickness of 9 mm of 19G steel were used for full-scale pipe sample production. One of the coils was intentionally damaged by machining, which resulted in “metal loss” defect, the other one was dented (by press machine) and got groove mark (by chisel). The testing of pipe samples was performed by applying static internal pressure to the moment of collapse. The calculation of deterioration pressure was carried out with the use of national and foreign methodical approaches. The calculated values of collapsing pressure for the pipe with loss of metal mainly coincided with the calculation experiment results based on Russian method and ASME B31G. In case of pipe with dent and groove the calculated value of collapsing pressure demonstrated greater coincidence with Russian method and to a lesser extent with API 579/ASME FFS-1. In whole, all calculation methods demonstrate sufficient stability of results, which provides reliable operation of pipelines with defects.

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Full-scale dynamic tests of a ground support system using high-tensile strength chain-link mesh in El Teniente mine, Chile

Proceedings of the First International Conference on Underground Mining Technology ◽

10.36487/acg_rep/1710_01_luis ◽

2017 ◽

Author(s):

Rico Brändle ◽

Erik Rorem ◽

Roberto Luis ◽

Germán Fischer

Keyword(s):

Tensile Strength ◽

Support System ◽

Full Scale ◽

Dynamic Tests ◽

High Tensile Strength ◽

Ground Support ◽

Chain Link ◽

El Teniente

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CREATING A WORKING MODEL OF A DRIVERLESS AIRFIELD TOW TRUCK

Bulletin of Bryansk state technical university ◽

10.30987/1999-8775-2021-10-45-52 ◽

2021 ◽

Vol 2021 (10) ◽

pp. 45-52

Author(s):

Denis D'yakov ◽

Iskander Valiulin ◽

Dmitriy Lihovidov ◽

Aleksey Velikanov

Keyword(s):

Research Methods ◽

Economic Efficiency ◽

Experimental Studies ◽

Field Tests ◽

Climatic Conditions ◽

Full Scale ◽

Support Surface ◽

Reliable Operation ◽

Working Model ◽

Full Scale Tests

The purpose of the research in this paper is to develop a promising airfield driverless tow truck to increase the economic efficiency of aircraft towing facilities, including unmanned aircrafts as well as to ensure reliable operation in various climatic conditions. The research methods include the analysis of the experience of using such driverless airfield tow trucks abroad, the theory of calculating traction and speed indicators and experimental studies conducted during the creation and study of field tests of devices used to load the driving wheels of a tractor. To achieve the goal, the configuration of the structure being designed and its intended composition are determined analytically. The operation of the designed device in the traction mode is considered, and the characteristic of calculating its indicators when moving along the support surface is presented. The presented material briefly illustrates the process from creating a model of a driverless airfield tow truck to the created design of an existing sample, which will later be used to conduct its full-scale tests and a comprehensive assessment of its strength traction and speed characteristics.

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